/Engine/Source/Editor/GameProjectGeneration/Public/GameProjectUtils.h
Updates the given project file to an engine identifier. Returns true if the project was updated successfully or if no update was needed
static bool UpdateGameProject ( const [FString](API\Runtime\Core\Containers\FString) & ProjectFile, const [FString](API\Runtime\Core\Containers\FString) & EngineIdentifier, [FText](API\Runtime\Core\Internationalization\FText) & OutFailReason )